Angewandte Chemie,
Год журнала:
2024,
Номер
136(22)
Опубликована: Март 25, 2024
Abstract
Endowing
perovskite
quantum
dots
(PQDs)
with
circularly
polarized
luminescence
(CPL)
offers
great
promise
for
innovative
chiroptical
applications,
but
the
existing
strategies
are
inefficient
in
acquiring
stimuli‐responsive
flexible
chiral
films
large,
tunable
dissymmetry
factor
(
g
lum
)
and
long‐term
stability.
Here,
we
report
a
strategy
design
synthesis
of
luminescent
cholesteric
liquid
crystal
elastomer
(Lumin‐CLCE)
mechanically
CPL,
which
is
enabled
by
crystal‐templated
self‐assembly
situ
covalent
cross‐linking
judiciously
designed
photopolymerizable
CsPbX
3
(X=Cl,
Br,
I)
PQD
nanomonomers
into
elastic
polymer
networks.
The
resulting
Lumin‐CLCE
showcase
structural
color
natural
light
noticeable
CPL
maximum
value
up
to
1.5
under
UV
light.
manipulation
intensity
rotation
direction
achieved
controlling
self‐assembled
helicoidal
nanostructure
handedness
soft
helices.
A
significant
breakthrough
lies
achievement
reversible,
perovskite‐based
switch
activated
biaxial
stretching,
enables
flexible,
dynamic
anti‐counterfeiting
labels
capable
decrypting
preset
information
specific
polarization
states.
This
work
can
provide
new
insights
development
advanced
materials
their
emerging
applications
encryption,
3D
displays,
beyond.
Chemical Society Reviews,
Год журнала:
2023,
Номер
53(2), С. 606 - 623
Опубликована: Дек. 15, 2023
This
review
highlights
the
recent
advances
and
discusses
challenges
perspectives
of
stimulus-responsive
polymer
(SRP)-based
information-storage
materials,
which
exhibit
multi-mode
or
multi-level
anti-counterfeiting
performance.
Journal of the American Chemical Society,
Год журнала:
2023,
Номер
145(24), С. 12951 - 12966
Опубликована: Июнь 5, 2023
Circularly
polarized
luminescence
(CPL)
is
attracting
much
interest
because
it
can
carry
extensive
optical
information.
CPL
shows
left-
or
right-handedness
and
be
regarded
as
part
of
high-level
visual
perception
to
supply
an
extra
dimension
information
with
regard
regular
light.
A
key
meeting
the
needs
for
practical
applications
develop
emerging
field
ultra-dissymmetric
CPL.
Chiral
liquid
crystal
(LC)
assemblies─otherwise
referred
cholesteric
crystals
(CLCs)─are
essentially
organized
helical
superstructures
a
highly
ordered
one-dimensional
orientation,
distinctly
superior
supramolecules.
CLCs
achieve
perfect
equilibrium
molecular
short-range
interaction
long-range
orientational
order,
enabling
molecule-scale
chirality
on
pitch
observable
scale.
LC
assembly
could
ideal
strategy
amplifying
chirality,
making
accessible
Herein,
we
focused
some
basic
but
important
issues
regarding
CPL:
(i)
How
created
from
chiral
dyes?
(ii)
Is
luminescent
dyes
essential
factor
generation
CPL?
That
is,
all
emit
vice
versa?
(iii)
transferred
within
intermolecular
systems,
what
principles
transmission
should
followed?
Given
these
queries
our
work,
in
this
Perspective
discuss
generation,
transmission,
modulation
assembly,
aiming
design
build
up
novel
chiroptical
materials.
Recent
CPL-active
microstructures
three-dimensional
displays,
circularly
lasers,
asymmetric
catalysis
are
also
discussed.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(36)
Опубликована: Июль 18, 2023
Stimuli-responsive
circularly
polarized
luminescence
(CPL)
materials
are
ideal
for
information
anti-countering
applications,
but
the
best-performing
have
not
yet
been
identified.
This
work
presents
enantiomorphic
hybrid
antimony
halides
R-(C5
H12
NO)2
SbCl5
(1)
and
S-(C5
(2)
showing
mirror-imaged
CPL
activity
with
a
dissymmetry
factor
of
1.2×10-3
.
Interestingly,
DMF-induced
structural
transformation
is
realized
to
obtain
non-emissive
⋅
DMF
(3)
(4)
upon
exposure
vapor.
The
process
reversed
heating.
DFT
calculations
showed
that
DMF-induced-quenched-luminescence
attributed
intersection
ground
excited
state
curves
on
configuration
coordinates.
Unexpectedly,
nanocrystals
chiral
1
2
were
prepared
indicate
excellent
solution
performance.
reversible
PL
switching
gives
system
applications
in
technology,
anti-counterfeiting,
encryption-decryption,
logic
gates.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(22)
Опубликована: Март 25, 2024
Abstract
Endowing
perovskite
quantum
dots
(PQDs)
with
circularly
polarized
luminescence
(CPL)
offers
great
promise
for
innovative
chiroptical
applications,
but
the
existing
strategies
are
inefficient
in
acquiring
stimuli‐responsive
flexible
chiral
films
large,
tunable
dissymmetry
factor
(
g
lum
)
and
long‐term
stability.
Here,
we
report
a
strategy
design
synthesis
of
luminescent
cholesteric
liquid
crystal
elastomer
(Lumin‐CLCE)
mechanically
CPL,
which
is
enabled
by
crystal‐templated
self‐assembly
situ
covalent
cross‐linking
judiciously
designed
photopolymerizable
CsPbX
3
(X=Cl,
Br,
I)
PQD
nanomonomers
into
elastic
polymer
networks.
The
resulting
Lumin‐CLCE
showcase
structural
color
natural
light
noticeable
CPL
maximum
value
up
to
1.5
under
UV
light.
manipulation
intensity
rotation
direction
achieved
controlling
self‐assembled
helicoidal
nanostructure
handedness
soft
helices.
A
significant
breakthrough
lies
achievement
reversible,
perovskite‐based
switch
activated
biaxial
stretching,
enables
flexible,
dynamic
anti‐counterfeiting
labels
capable
decrypting
preset
information
specific
polarization
states.
This
work
can
provide
new
insights
development
advanced
materials
their
emerging
applications
encryption,
3D
displays,
beyond.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Янв. 4, 2024
Abstract
Colorful
circularly
polarized
luminescence
materials
are
desired
for
3D
displays,
information
security
and
asymmetric
synthesis,
in
which
single-emitted
ideal
owing
to
self-absorption
avoidance,
evenly
entire-visible-spectrum-covered
photon
emission
facile
device
fabrication.
However,
restricted
by
the
synthesis
of
chiral
broad-luminescent
emitters,
realization
application
high-performing
full-color
is
its
infancy.
Here,
we
disclose
a
system
(spiral
generator),
composed
whole-vis-spectrum
emissive
quantum
dots
liquid
crystals.
The
achieves
maximum
dissymmetry
factor
0.8
remains
an
order
10
−1
visible
region
tuning
photonic
bandgap.
We
then
expand
it
series
customized-color
luminescence,
build
devices
further
demonstrate
working
scenario
photoinduced
enantioselective
polymerization.
This
work
contributes
design
efficient
chiroptical
materials,
fabrication
synthesis.
Advanced Materials,
Год журнала:
2024,
Номер
36(18)
Опубликована: Янв. 25, 2024
Abstract
Integrating
optically
active
components
into
chiral
photonic
cellulose
to
fabricate
circularly
polarized
luminescent
materials
has
transformative
potential
in
disease
detection,
asymmetric
reactions,
and
anticounterfeiting
techniques.
However,
the
lack
of
cellulose‐based
left‐handed
light
(L‐CPL)
emissions
hampers
progress
these
functionalizations.
Here,
this
work
proposes
an
unprecedented
strategy:
incorporating
a
nematic
organization
hydroxypropyl
with
robust
aggregation‐induced
emission
luminogens
generate
intense
L‐CPL
emission.
By
utilizing
N
,
‐dimethylformamide
as
good
solvent
for
fluorescent
matrices,
produces
right‐handed
structure
film
uniform
appearance
reflective
states.
Remarkably,
system
integrates
high
factor
(0.51)
impressive
quantum
yield
(55.8%)
one
fascinating
composite.
More
meaningfully,
approach
is
versatile,
allowing
incorporation
luminogen
derivatives
emitting
multicolored
L‐CPL.
These
films
possess
exceptional
mechanical
flexibility
(toughness
up
0.9
MJ
m
−3
)
structural
stability
even
under
harsh
environmental
exposures,
making
them
promising
fabrication
various
products.
Additionally,
can
be
cast
on
fabrics
reveal
multilevel
durable
capabilities
or
used
source
induce
enantioselective
photopolymerization,
thereby
offering
significant
diverse
practical
applications.
Advanced Materials,
Год журнала:
2024,
Номер
36(16)
Опубликована: Янв. 12, 2024
Stimuli-responsive
circularly
polarized
luminescence
(CPL)
materials
show
great
promise
in
applying
information
encryption
and
anticounterfeiting.
Herein,
light-driven
CPL
sign
inversion
is
achieved
by
combining
a
photoresponsive
achiral
negative
dichroic
dye
(KG)
static
positive
(NR)
as
dopants
at
the
0.5:0.5
weight
ratio
into
cholesteric
liquid
crystal
(CLC)
host.
The
side
chains
of
KG
undergo
trans/cis
isomerization
after
365
nm
UV
light
irradiation,
leading
to
dichroism
(S
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(11), С. 7668 - 7678
Опубликована: Март 7, 2024
Organic
phosphors
integrating
circularly
polarized
persistent
luminescence
(CPPL)
across
the
visible
range
are
widespread
for
applications
in
optical
information
encryption,
bioimaging,
and
3D
display,
but
pursuit
of
color-tunable
CPPL
single-component
organics
remains
a
formidable
task.
Herein,
via
situ
photoimplanting
radical
ion
pairing
into
axial
chiral
crystals,
we
present
elucidate
an
unprecedented
double-module
decay
strategy
to
achieve
colorful
through
combination
stable
triplet
emission
from
neutral
diphosphine
doublet
radiance
photogenic
radicals
exclusive
crystalline
framework.
Owing
photoactivation-dependent
component
inherent
phosphorescence
asymmetric
environment,
CPL
vision
can
be
regulated
by
altering
photoactivation
observation
time
window,
allowing
glow
tuning
blue
orange
delayed
green
emission.
Mechanism
studies
clearly
reveal
that
this
electron
migration
environment
hybrid
n–π*
π–π*
instincts
responsible
afterglow
at
ambient
conditions.
Moreover,
demonstrate
displays
encryption
manipulation
both
excitation
times.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(26)
Опубликована: Апрель 10, 2024
Manipulation
of
periodic
micro/nanostructures
in
polymer
film
is
great
importance
for
academics
and
industrial
applications
anticounterfeiting.
However,
with
the
increasing
demand
on
information
security,
materials
time-dependent
features
are
urgently
required,
especially
material
where
same
can
appear
more
than
once
time
scale.
Here,
one
concise
strategy
to
realize
anticounterfeiting
"double-lock"
encryption
based
a
host-guest
system
proposed,
photoresponsive
azopolymer
as
host
liquid-crystalline
molecule
guest.
The
exhibits
tunable
mass
transport
pre-designed
by
tailoring
process
cis-to-trans
recovery
azo
groups
assembly
mesogenic
trans-isomers,
resulting
dynamic
structural
color
film.
Taking
advantage
this
extraordinary
feature,
has
been
achieved.
More
importantly,
each
state's
appearance
whole
be
modulated
changing
ratio.
Combining
manipulatable
unique
decoding
method,
stored
decrypted
correctly.
This
work
provides
an
unprecedented
approach
advanced
technology
higher
level
security
high-end
encryption.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(46)
Опубликована: Сен. 25, 2023
Herein,
chiral
deep
eutectic
solvents
(DES)
are
prepared
by
lauric
acid
as
hydrogen
bond
donors
(HBD)
and
menthol
acceptors
(HBA).
When
achiral
fluorescent
molecules
dopedin
the
menthol-based
DES,
they
emit
circularly
polarized
luminescence
(CPL)
with
handedness
controlled
molecular
chirality
(l
or
d)
of
menthol.
Remarkably,
strategy
is
universal
a
series
can
be
endowed
CPL
activity,
showing
full-color
white
upon
appropriate
mixing,
which
paves
way
to
prepare
materials.
Interestingly,
appears
only
in
certain
temperature
range
DES.
Variable-temperature
spectra
other
characterization
methods
reveal
that
H-bond
network
DES
plays
an
important
role
inducing
CPL.
This
work
unveils
how
interior
structure
well
hydrogen-bond
transfer
its
luminophores
for
first
time
realizes
